Grinding-machine.



No. 64u73.

w. c. BAKER. GRINDING MACHINE.

(Application led May 9, 1898,\

Patented 1an. 9, |900. A

8 Sheets-8heet I,

WMM 6. @a WMWM No. 64H78. Patented 1an. 9, |906. W. C. BAKER.

GRINDING MACHINE'.

n (Application ld May 9, 1898) "(No Mudel.) 8 Sheets-Sheet 2l.

W/T/VESSES; /NVENTOH No. 64u78. Paiented 1an.l9,`|9oo.

w. c. BAKER@ GRINDING MACHINE.

(Application filed May Q, 1898.) (Nomodel.) 8 Sheets-Sheet 3.

N @Ma 72% /MQ #EMM (yjm No. 64l,|78. Paien'ted lah. 9, 190D.V W. C. BAKER.,

GRINDING MACHINE.

(Application filed May 9, 1898.) (No Model.)

8 Sheets-Sheet 4.

WWA/5855s /N VENTO@ @Mca 73% me nofws swiss co., uom-uma.. WASHINGTON, D4 c,

Patented 1an. 9, |900. W. C. BAKER;

`GRINDIMG MACHINE.

8 Shees sheet 5A (Nn Model.)

gli@ ATTORNEYS No. 64u78. Patn'ted'lan. 9, ,|900.

w. c. BAKER.

'GRINDING MACHINE.

(Application filed May 9, 189B.)

'- a sheets-sheet s.

(No Mode.)

ATTORNEYS Y mr nonms nerfs co, Pacto-uws.. wAs 1rmrror-A4 n. c.

No. 64u78. Patented 1an. 9, |900.

y w. n. BAKER.

GRINDING MACHINE.

(Application filed May 9, 1898.)

(No Model.) s sheets-shaet 7.

@nati @lf/L fyi/ 734// A TTOHNE YJ his Nnnms Farms co. PHOTO-Limo., vwsnmmom o c.

No. 64H78. Patented Jan. 9, |900.. W. C. BAKER.

GEINDING MACHINE.

(Application filed May 9, 1898.)

(No Nlndei.)V 8 sheets-sheet LB.

Fm De WWA/5335's y /N VEA/TOR A TTOHNE YS Unr'rnn @raras Parana* @erica WALTER C. BAKER, OF CLEVELAND, OHIO.

GRINDINGHMACHINE.

SPECIFICATIUN forming part of Letters Patent No. 641,178, dated January 9, 1900.

Application led May 9, 1898. Serial No. 680,149. (No model.)

To a/ZZ wil/0m it nm/y concern:

Be it known that I, WALTER C. BAKER, of 0leveland, Cuyahoga county, State of Ohio, have invented certain new and useful lmprovements in Grinding-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to machines more especially adapted for automatically grindingA or finishing cones both on the outer surface and in the interior and also for finishing or grinding theinterior of ball cups or races and other like articles which are finished in the interior or on the exterior or are finished both in the interior and on the exterior;7

My invention consistsin the peculiar construction of the machine as a whole, whereby the article is linished both on the exterior and in the interior at one and theV same time and with one and the same chucking.

My invention also consists in the peculiar construction, operation, arrangement, and location of certain slide-rests which are secured adjustably to the bed of the machine and are automatically operated back and forth across or in line with the surface to be finished or ground.

My invention consists, further,in details of construction, which will be hereinafter more fully set forth and claimed.

In the drawings, Figure I is a view in side elevation of a machine constructed according to my invention. Fig. II is a View in side elevation of the slide-rest supporting and operating the grinding-wheel for acting on or grinding the outer surface of the article as it is rotated in the chuck of the machine. This figure also shows the operating-cam and the method of connecting the same with a sliderest which is operated thereby. Fig. lII is a View of the slide-rest looking at the same from a point at right angles to Fig. Il. Fig. IV is a plan view of the slide-rest, illustrating the method of reciprocating the same along the line of work and also illustrating the operation of the severaladjusting devices and their relation with each other. Fig. V is a view in rear elevation of the slide-rest which supports and operates the wheel for operating on the interior surface of the article as it revolves in the chuck. Fig. VI is a View in side elevation of the same slide-rest, showing more clearly the cam mechanism and connecting-lever whereby this slide-rest is reciprocated along the line of work. This view also illustrates the arrangement of the ball-bearing mechanism provided for the Wheels spindle. Fig. VII is a plan view of this slide-rest, showing more clearing' the relation of the adjusting features and also showing the hand operating-lever which is designed to be used more especially in iin; ishing the interior of antifriction-ball cups or races. Fig. VIII is a bottom viewv of a portion of the forward slide-rest. Figs. IX and X, are respectively sectional and plan views illustrating the rack-andpinion construction and the lever arrangement for ac-V complishing the automatic reciprocation of the grinding-wheel which acts on the exterior or outer surface of the article. Fig. IX also illustrates the swiveling arrangement for this slide.

A represents the bed of the machine, is mounted upon legs B B.

C represents the head of the machine, which operates a chuck of suitable construction for grasping, retaining, and rotating the article to be operated upon. A suitable pulley is provided, which receives its motion through a belt, whereby the chuck and the article retained therein are rotated.

D represents a grinding-wheel which is independently mounted and independently driven. adjusted, and operated as to grind or operate on the exterior of a rotating article, thus truing and iinishing the outer surface of the same.

The method of mounting, operating, and adjusting the grinding-wheel D is illustrated in Figs. l, Il, HI, and lV and is as follows: At one side of the bed A is provided a dovetailed way AC This dovetailed way A is engaged by a dovetailed recess provided at one side of the base F of the slide-rest. It is by means of the waylA and the dovetailed groove orrecess above set forth that the sliderest may be adjusted along the length. of the bed A as desired or found necessary. The

which slidelfrest is'retained in any predetermined position along the bed A by means of screws This grinding-wheel D is so located,

IOO

a ci, which bear against a gib, which in turn bears against the way A'. The loosening or tightening of the screws d a allows the slide-rest to be removed or retained in place.

F represents a recess formed in the upper part of the base F. This recess F is adapted to receive a journal G, which lits said recess and projects downward from and forms part of a section G of the slide-rest. The journal G fits into the recess F in such a manner as to revolve therein, or, in other words, it is swiveled therein, allowing the rest above the base to assume any horizontal angle relative to the bed of the machine or the work that is found desirable or necessary. This construction and operation is illustrated in Figs. III and IV by dotted lines and in Fig. IX in section.

ff represent bosses, one on each side of a split F2, which is formed through the'upper portion of the base F and into the recess F. The bosses ff are engaged by a clam p-screw F3, the function of which is to contract the recess F by contracting the split F2, and thus to hold the journal G in position after the rest has been properly adjusted at this portion. In order to facilitate this angular adjustment between the base Fand the section G', I prefer to provide a suitable scale g, which cooperates with a suitable pointer or line to determine the horizontal angle of the upper portion of the slide-rest, or, more properly speaking, the wheel D, in relation to the work. It will be understood that the scale g is provided to one section and the coperating pointer or markis provided to the other section.

G2 and H represent a dovetailed slide connection formed at the upper face of the section G', allowing the section H to be reciprocated and also adjusted in relation to the section G.

The method of adjusting and reciprocating the section H is as follows: H4 represents a bar properly seated in the upper face of section G, so as to be free to slide in said section. To the outer end of the bar H4 is secured an adj Listing-nut H2, which engages a male screw-thread on the end of the bar H4. The nut H2 is journaled in a bearing provided at the end of the section H. Thus it will be seen that as the nut H2 is turned in one direction or the other the section H will be adj usted in relation to the section G. The har H4 at its inner end is formed into a rack H5, which engages a pinion I. The pinion I is mounted on the upper end of a vertical shaft I', which extends through and bars'in section G' and base F. At the lower end of the shaft I is secured an arm I2, said arm being bifurcated or provided with an elongated slot for the purpose of regulating the range of feed or reciprocation. The arm I2is adjustably connected to the short arm j' of a pivotal lever J by means of adj usting-stud J2, which may be of any suitable construction adapted to change or regulate the relation between the lever J and the arm I2. The construction and operation above set forth are illustrated in dotted lines in Figs. III and IV and more clearly in Figs. IX and X. The lever J is pivoted atj to the base F, and the end of its long arm J is provided with a roller J 3, which engages with a cam K. The cam K oscillates the lever J, which motion is communicated through lthe arm I2 to shaft I and thence to the pinion I. The pinion I, engaging the rack H5 on the bar H4, reciprocates the section H, and with it the wheel D, thus automatically feeding the wheel D along the line of the outer surface of the article to be finished or operated upon. (See Fig. IV of the drawings.)

By the above construction of adjusting and reciprocating mechanism it will be seen that the slide H may be adjusted in relation to the section G without regard to the reciprocating device or without altering the relation of the reciprocating device to the parts or altering the range of feed. This is accomplished by adjusting the hand-nut H2.

H6 and L represent a dovetailed slide connection formed between the upper face of section H and the lower face of section L. The slide connection H6 and L is located so as to be approximately at a right angle to the slide connection between sections Gl and H and is used for the purpose of setting the grinding-wheel D in relation to the work, or, in other words, this adjustment is used for tlie purpose of regulati-ng the cut of the wheel D. The adjusting device for operating this slide connection is constructed and operated as follows:

L3 represents a screw-threaded spindle or feed-screw having at its outer end the usual hand-wheel L2. The spindle or feed-screw L3 is journaled at its outer end in section L, as illustrated in Figs. II and IV of the drawings.

L4 represents a sliding nut or block (see Fig. VIII) which fits into a seat in section H in such a way as to slide in said section when not locked in position. The screw-threaded portion of spindle or feed-screw L3 engages the female screw-thread of nut or block L4, and when said nut or block L4 is locked in positionxthe turning of the spindle or feed screw L3 will adjust the section L in or outin relation to the section H.

In order that the wheel D may be quickly removed away from the work without altering th'e adjustment of the wheel D in relation to the work when said wheel is again returned to operative position, I provide a locking device or quick-lever-movement device which is constructed as illustrated in Fig. VIII and operates as follows:

M represents a lever which is pivoted at h to one side of section I-I. The lever M is provided with a slot fm, which engages a stud h2, the stud h2 in turn being secured to sliding block or nut L4.

M represents a lever pivoted centrally to the lever M at or near the free end of said IOO IIC)

lever M. The handle of the lever M is in proximity to the handle M2 of lever M. The opposite end of the lever M' engages a spring pin or latch M3, which in turn engages with the section H. Thus it will be seen that when spring pin or latch M3 is disengaged from slide H the lever M may be drawn away, carrying with it the block or nut L4 a-nd the slide or section L, thus removing the wheel D quickly from the work. Upon the return of the lever M to its normal or first position or locked position the wheel D assumes the same position in relation to the work that it occupied before the lever M lwas released, and hence the Wheel D need not be readj usted by feeding the slideor section L to and from the work by means of the feed-screw or spindle L3. It will also be seen that a slow and fine adjustment is obtained between section H and L by means of spindle L3, and at the same time the section L, and with it the wheel D, can be quickly withdrawn from the work. It will also be seen that the quick action above set forth is accomplished in a straight line in contradistinction to a curved line both to and from the work. This is an essential feature, for the reason that where the quick action is accomplished in a curved line from the work, as around an axis, the wheel D is liable to become misadj usted from its former position in relation to the work on account of foreign matter which may work between the moving parts, while in my construction foreign matter does not affect the relative relation of the parts, which always return or recede at a right angle to the range of feed or the surface being cut.

The section L is provided with suitable housings N N, which sustain the bearings and spindle or shaft of the wheel D. The peculiar bearings of this spindle and the spindle of the wheel E, operating in the interior of the article, as illustrated in Fig. VI of the drawings, Willbe fully set forth hereinafter.

E represents a grinding-wheel mounted on the spindle E. The wheel E is of such size as to easily enter and freely revolve within the bore or interior of the article which is to be operated upon or finished. The bearings of the spindle E are mounted in housings U U. The housings U U are preferably formed in one casting, as illustrated in Fig. VI, and provided with a base U', which is swiveled to that part of the slide-rest which supports and directly operates the same. The object in swiveling the housing of the spindle E is to allow the changing of the angle of the grind-- ing-wheel E in relation to the work either for the purpose of giving the said wheel a clearance or for the purpose of presenting aproper grinding or abrading surface to the surface to be removed. A stud E2 is provided for the purpose of tightening orsecuring the housing in position after the same has been set In my machine itis designed that the wheel E shall have a range of feed equal to or slightly in excess of the length of the surface or bore to lbe ground, and it is also designed that it shall have an automatic movement back and forth through this range of feed. Itis further designed that the wheel E shall be so mounted as to have an independent quick movement for removing or retracting the wheel for the purpose of gaging, placing, or removing the article being operated upon. This quick movement should not interfere withthe adjustment of the wheel E in its' relation to the work.

In order to attain the above objects, the wheel E is mounted and operated as follows: O represents the base of the slide-rest upon which the wheel E is mounted and operated. The base O rests upon the shears of the bed A and has a tongue O2, which extends down from the base and fills the space between the cheeks of the bed A. Secured to the base O and extending downward therefrom is a rod O', which is provided atits lower end with a screw-thread adapted to engage the female screw-thread of a hand-wheel O3. The rod O/ passes through a cross-bar O4, extending from side to side across the bottom of the bed A, and the hand-wheel O3, in connection with said cross-bar O4 and the rod- O", acts as a clamp to hold the slide-rest in any predetermined position on the bed A. The slide-rest has a range of adjustability the full length of the bed A.

P represents a dovetailed slide. (Shown in dotted lines in Fig. VI.) The direction of the slide P is approximately at a right angle to the bed A, or, in other words, is in a direction across the machine. The usual adjusting-screw P2 and hand-wheel P3 are used for ad justing or setting this slide. Slide P connects the base O with the section P of the slide-rest and is employed for the purpose of TOO setting the wheel E to the proper cut, and

hence determines the depth of the cut of the wheel E upon the surface of the bore or upon the innersurface of the article operated upon.

Secured to the upper surface of the section P by means of a dovetailed slide R is a section R of the slide-rest. This section R is formed in two parts S S. The part S' has sliding relation with the part S in a direction with the length of the machine and the axial line of the article being operated upon.

The two-part section R and its swiveled housings U U and the attached wheel E are automatically reciprocated by means of acam R5, which engages a lever R2 by means of a roller R6. The roller R6 is mounted on the lower end of the lever R2 and engages the camgroove. The lever R2 is provided at its central portion with anelongated slot r, through which passes the adjusting-stud or pivot-bolt i'. The pivot-bolt rengages an elongated slot in a bracket R3, which in turn is secured to the base O of the sliderest. The moving of the stud or pivot-pin r up or down will adjust the IIO ling a turn-table or swivel connection.

fi arrive throw or range of reciprocation of the sections S and S'. The upper end of the lever R2 is pivotally attached to the rear end of the section R by means of a pivot-bar R7. The pivot-bar extends from side to side of the section R at its rear end and is pivoted in lugs r2 r2, preferably formed integral with the said. section. Thus it will be seen that as the cam R5 revolves the lever R2 is o scillated and in turn reciprocates the section R back and forth through the range of feed.

The object in making the section R in two parts S and S is for the purpose of allowing the upper part S to be slid back quickly when itis desired to gage, remove, or replace the work. The part S may be held in position on the part S by friction,or,if desired,a clampscrew S3 may be employed to clamp said parts together. Suitable stops (not shown) are provided for limiting the forward and rearward movement of the part S on the part S. By this construction the wheel E can be quickly removed from the work when desired and again quickly returned to the work in proper feeding position without altering the adjustment or set of the wheel in relation to the work.

In order to provide for reciprocating the wheel E by hand independent of the cam movement, I have provided a lever T. The lever T is pivoted to the part S of the section R at T2, and at one end is provided with a handle T. At the opposite end the lever T is provided with an elongated slot which engages a pin or stud T3, which in turn is secured to the top of the part S of section R. Thus it will be seen that by moving the lever T back and forth a limited movement is obtained, thus reciprocating the wheel E independently of the cam movement. The lever T is more especially valuable as an adjunct to the machine when grinding or finishing ball cups or races.

By the construction above set forth it will bel seen that the wheel E can be quickly taken from the work and returned to the same in a straight line incontradistinction to a curved movement, such as would result by employ- This allows the wheel E to retain its adj usted position in relation to the cut, which would not result, or might not result, in the swiveled or turn-table construction.

I will now proceed to set forth the construction of the bearings for the spindles of the grinding-wheels D and E,which are constructed in the same manner. In describing these bearings attention is called to Fig. VI of the drawings, which at its upper portion shows a sectional view taken through the housings and bearings.

U U represent the housings, the end View of which is illustrated more clearly in Fig. V of the drawings. The housings U U are formed large enough to receive ball-cups l 1. The ball-cups l l face each other at their open ends and are confined in the housings U U by means of caps 2 2. The caps 2 2 are secured to housings U U by means of suitable screws.

4 4 represent balls which run in the. races of cups -l l and bear on cones 5 5, which are secured to the spindle E. The cones 5 5 revolve with spindle E', and hence t said spindle snuglyy Retaining-rings are employed for keeping the balls 4 4 in position while assembling the parts.

6 6 represent disks which surround the shaft or spindle E' loosely and tit the open ends of the cups l l snugly or tightly.

8 8 represent two annular disks, of felt or analogous material, which surround the spindle E inside of the disks 8 8 and prevent dust or water from working into the bearing.

In order to adj ust the bearings, I have provided one of the cups l, preferably the rear one, with an exterior screw-thread p and provided a disk 9 with an internal screw-thread which engages the screw-thread p. Thus it will be seen that by tightening the disk 9 against the housing II U the cup 1 is drawn inward, thus adjusting the bearings in both housings.

By providing ball-bearings a spindle of larger diameter may be used and at the same time a high rate of speed attained. This is a very desirable feature, inasmuch as when spindles of small diameters are used, as are necessary with an ordinary bearing when a high rate of speed is desired, there is more or less vibration of the spindle and its attached grinding-wheel, and hence the work cannot be crowded, nor can adeep cut be made. With the construction of bearing illustrated and described herein a heavier or thicker shaft or spindle can be used and at the same time a high rate of speed attained without heating the journal or bearings. The end thrust of the shaft in its reciprocation is sustained by the balls, ball-cups, and cones, instead of being sustained by the ordinary shoulders of the shaft, as in ordinary bearings.

Cams K and R5 are mounted and revolved upon a shaft W, which extends along the interior of the bed A. The cams K and R5 are connected to the shaft W by means of a spline, allowing the said cams to be moved longitudinally on the shaft W, and thus keep them in proper relation to their levers and to the slide-rest. The method of moving the cams K and R5 with the slide-rest is, as illustrated in Figs. II and III of the drawings, by means of an arm Y, which is connected to the cam in such a manner as to move it along the shaft W as the slide-rest is moved and at the same time allow it to revolve freely and retain it in proper relation to the slide-rest and its lever. As illustrated in Fig. VI of the drawings, the cam R5 is inclosed between a yoke composed of arms Y Y', extending downward from the base O and secured to said IOO IIO

base, and thus it will be seen that as the sliderest is moved along the bed A the cam R5 retains its relative position with the lever R2.

While I have set forth and described in this application details of construction Which, in my opinion, are best adapted to perform the several functions allotted to them, still I do not wish to be understood as limiting my invent-ion to these details, inasmuch as they may be varied Without departing from the scope of my invention.

What I claim isl. In a grinding-machine of the character set forth, the combination With a grinding- Wheel, of a slide-rest upon which said wheel is mounted and is operated, said slide-rest being adjustable along the length of the bed of the machine, adjustable horizontally in a circle, in relation to its base, and adjustable in directions at right angles to each other, and means for automatically reciprocating the grinding-Wheel along the range of feed substantially as shown and described.

2. In a grinding-machine of the character set forth, the combination with a rotary chuck adapted to hold and rotate the article, of a reciprocating grinding- Wheel mounted and operating upon an adjustable slide-rest, said slide-rest being swiveled to a base, the base, in turn, adapted to be adjusted along the bed of the machine, means for automatically reciprocating said grinding\vheel above the swiveled connection, means for adjusting the extent of reciprocation and a transverse slide, and means thereon for regulating the cut of the grinding-Wheel substantially as set forth.

3. In a grinding-machine of the character set forth,the combination with a rotary chuck, of a rotating and reciprocating grinding- Wheel, said grinding-Wheel being-swiveled in relation to the bed of the machine and the chuck, for the purpose of regulating the range of feed, and means for adjusting the extent of the reciprocation and the cut located above said swiveled portion, and means for automatically reciprocating the grinding-Wheel along the range of feed, substantially asset forth.

4. In a grindingmachine of the character set forth,the combination with a rotary chuck, of grinding-wheels mounted and operated upon sliderests, said slide-rests being adj ustable along the length of the bed of the machine, and both provided with sections which are automatically reciprocated, thus, in turn, reciprocating their respective grindingwheels, and sections movable in relation to said automatically-reciprocated sections, said movement being in the same direction as the reciprocation, whereby an article may be in ished on both its interior and exterior at the same time with one chucking, and whereby the Wheels may be removed from their work quickly, substantially as and for the purpose set forth.

5. In a grinding-machine of the character set forth, the combination with the rotating chuck for holding and rotating the article to be operated upon, of a grinding-Wheel, said grinding-Wheel being mounted upon and automatically reciprocated by a suitably-operated slide-rest, said slide-rest, in turn, being provided with means substantially as set forth, whereby the grinding-Wheel may be quickly removed from the Work in line With its range of feed or reciprocation and the extent of reciprocation adjusted and a transverse slide and means thereon for regulating the cut of the grinding-Wheel, substantially as and for the purpose set forth.

. 6. In a grinding-machine of the character set forth, the combination With the rotating chuck adapted to hold Vand rotate the article to be operated upon, of a grinding-Wheel for operating upon the article, said Wheel being mounted upon a slide-rest which is swiveled in relation to the bed of the machine automatically reciprocated in line with the aXis of the article, thus, in turn, reciprocating said Wheel, in combination With an adjustable lever, and a cam operating in conjunction with said lever to automatically reciprocate the said slide-rest and Wheel, the cam, in turn, being so connected, to said slide-rest, as to move With the same as the slide-rest is adjusted along the length of the machine, and means for regulating the cut of the grinding- Wheel substantially as and for the purpose set forth.

7. In a grinding-machine of the character set forth, the combination with a rotating chuck for holding and rotating the article to be operated upon, of a grinding-wheel for operatingupon the article, said grinding-Wheel being mounted upon anautomaticallyreciprocated slide-rest, said slide-rest being swiveled and adjustable lengthwise, in relation to the bed of the machine, and a rackandpin ion mechanism located above the swiveled portion of the slide-rest, a shaft connected to said pinion, and adjustable rocking levers connected with and operated by a cam for the purpose of automatically reciprocating the upper portion of the slide-rest, said cam being so connected to the slide-rest as to move with the same, as the slide-rest is adjusted along the bed of the machine, substantially as and for the purpose set forth.

8. The combination, in a grinding-1nachine3 of a rotating chuck, grindingwheels operating upon the article, means for adjusting said grinding-Wheels in relation to the Workpivhere by the article may be finished on both its interior and exterior simultaneously with one chucking, means for removing said grindingi Wheels from the Work independent of the reciprocating mechanism, and cams operating adjustable levers for automatically reciprocating the grinding-wheel, both cams being mounted upon, and operated by, a single shaft, and both cams being movable along the shaft, substantially as and for the pur pose set forth.

9. The combination, in a grinding-machine;

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ically reciprocating said Wheels along their range of feed, or line of Work, and independ- I5 ent means for removing the Wheels from the work, in a line with the range of feed, Without interfering With a set of said Wheels, substantially as and for the purpose set forth.

Signed by me at.Cleveland, Ohio, this 20th zo day of April, 1898.

WALTER c. AKER.

Witnesses:

W. E. DONNELLY, ANNA H. PANATT. 

